Fe-Mn-Si 系形状记忆合金中热诱发ε马氏体的形成机制  

Formation Mechanism of Thermally Induced ε Martensite in Fe Mn Si Based Shape Memory Alloys

作　　者：郭正洪[1] 戎咏华[1] 陈世朴[1] 徐祖耀[1] 

机构地区：[1]上海交通大学材料科学系

出　　处：《上海交通大学学报》1998年第2期41-44,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金;Emerson Electric Co.;USA 资助

摘　　要：通过透射电镜观察和热力学分析，定性地讨论了热诱发γ→ε马氏体相变机制．电镜观察结果表明，层错可以在降温过程中持续形成，并通过堆垛形成马氏体相．热力学分析表明，对于低层错能的合金，热诱发马氏体的形核及长大过程来自于不断地形成新的层错并消耗母相结构，而并非由极轴机制所控制．Based on TEM observation and thermodynamic analysis, the mechanism of thermally induced γ→ε martensitic transformation is discussed. The TEM result reveals that the stacking faults take form during the decrease of temperature, and the stacking process leads to the formation of martensite. The thermodynamic analysis proves that the nucleation and growth of martensite result from continual formation of the stacking faults at the expense of the parent structure, instead of being dominated by pole dislocation mechanism.

关 键 词：马氏体相变 层错 形状记忆合金 

分 类 号：TG139.6[一般工业技术—材料科学与工程]